Siemens M7-400 用户手册
M7-400 Expansions
12-11
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
A5E00069467-07
Addresses Within an Expansion Module
Each expansion module occupies 256 bytes (100
H
) within the CPU/FM address
area. The division of the 256 addresses within an expansion module can be seen
from Table 12-2.
from Table 12-2.
Table 12-2 Division of Addresses Within an Expansion Module
Address
Function/Slot
Remarks
00
H
to 3F
H
Reserved
In this address area, the automation computer’s
BIOS makes basic settings in the expansion
module such as assignment of interrupts, etc.
BIOS makes basic settings in the expansion
module such as assignment of interrupts, etc.
40
H
to 7F
H
Interface submodule x
80
H
to BF
H
Interface submodule y
C0
H
to FF
H
Interface submodule z
Base Addresses of the Interface Submodules
Special characteristics of the interface submodules such as the location of the
AT-compatible I/O addresses (IF 962-COM, IF 962-LPT, ...) are set via the base
addresses, or the interface submodules are accessed exclusively via these base
addresses (IF 961-DIO, IF 961-AIO,...).
AT-compatible I/O addresses (IF 962-COM, IF 962-LPT, ...) are set via the base
addresses, or the interface submodules are accessed exclusively via these base
addresses (IF 961-DIO, IF 961-AIO,...).
The base address for an interface submodule is obtained from the sum of the
slot-dependent address of the expansion module and the interface submodule
address within the expansion module. You can find the resulting base addresses in
Tables 12-3 and 12-4:
slot-dependent address of the expansion module and the interface submodule
address within the expansion module. You can find the resulting base addresses in
Tables 12-3 and 12-4: